Multiple roll-set board drop hammer



M. H. FLYNN 1,929,021

MULTIILE ROLL SET BORD DROP HAMMER Filed May 3, 1926 2 Sheets-Sheet l ATTORNEY Oct. 3, 1933. M H. FLYNN.

l MULTIPLE ROLL SET BOARD DROP HAMMER Filed May 3. 1926 2 Sheets-Sheet 2 Patented Oct. 3, 1.933

f UNITED STATES PATENT -QFFICE MULTIPDE RoL'LLsET BOARD meerV HAMMER A f K Michael H. Flynn, Hartford, Conngassignor to` t Y 1 .The Billings & Spencer t Company, Hartford,

' Conn., a corporation Vof Connecticut Application Maya 1926; serial No;106,423 4s claims. lords-29) The objectof theinvention is animprovement in thetmechanism for causing the lifting rolls of the several setstobearsimmtanecusly and equally upon the hammer board. Thesefrolls and their Q 'supports and the members whichmove the latter are ponderous structures butare required to move vQ [ucltly into otfof board-gripping Vv.position some considerable difficulty hasheen n- 'countered under these conditions, incausing m themtoeizert'substantially equalpressure on the hammer board as well as in causing lthem to rethe hoard simultaneously. 'Failure of .the rolls to act in close unison when'engagih'g, aswell when Vdis,engaging, the board interferes with M sustained reciprocation of the hammer, besides injuring and shortening the life of 'the board.

The present inventiqnovercomes the dihc'uities efeed'tm by the use of mechanism .si'mple'in 191m" the least subject to derangement, under lll the severe, conditions of drop hammer use.` The invention consists in theorganizationpffthe means and in the principle thereof as hereinafter mlmd- I' 'a Y V l mtr @nibard drop tipp applied, ,4 Fig.' 2 is a largertscale side elevation of the mllhcadifisl-V rais. large'seale front e1evat1bn1heeof.

o hammer having` the `.itu/en'- l). 'lg/..4 "a top ,plan of the rollhead withparts' "-7,5, 6 are respectively diagrammatic presentations of modified forms of vpressure- N linkage withinrthis invention.,l

3, hetgeen which the hammers is guided, and a rollfheadstructure 4, joining the topof the'uprights, and Yin which the lifting rolls and. DQI ,central melanslandalso the board clamp are jlherolls vof the upper pair `orset are marked "5 and irespectivelmand those of the'lowerset,

:All:

arfd` 46. All of the rolls are xed on roll shafts "c hammer comprises a base 1, two uprights .the friction-bar `26,`or to such other hammer- Liii 'ortsheir .arms 9 `which latter are split t andprovided with bolts. V for that purpose and as indicated.' The rolls '5? and 5710i the upper roll As et are geared together bygears 14 and driven by pulley lfxed tothe extended end of the rear roll sh.aft,. and similarly, the lower rolls 6 and 6a y are, geared together by gears 16 and driven by a pulleylliixed on the rear roll shaft at the p-fV p ositeside of the machine.V f The two pulleys will be understood to he belted .to a 'common' overhead driveshaftfand drivenfin'the sanhedirection.`

, 65 `The .eccentricities of theupper rollsupports or 'bushings are equal but opposite to'the eccelle tiicitiesfofftlie lower roll supports, so that movemerit of V,the upper and lower arms 9 toward or from eachother, that is to say in mutually/ op` 7o positedirections produces bodily movement ofthe corresponding rolls toward or fromfthe hammer hoard, that isl to say,in the same direction. "In the presentcase a separating movement of the two Vfront arms Q produces movement ofthe two front A7g rolls 5 and 1 6 toward the hammer board,`but this ,can reversed ifd'esired by, reversing fthefdirection of the'lechcentricity of each4 bushing with Ithe effect, Movement in the same direction, of Vthe rear roll arms-produces similar V rnovex'nent of the rear rolls, but these rolls are intended to bvefixed and the movement of the arms isfor adjustment only, Forths purpose the ver'- tical A1 8 isconnected tothe cross-pinl ofthe eccentriobushings `of ther'rupper'rear rolls and to pin lief thelower rear roll and rod 1 9is Similarly connected to thecrossfpin 1'1 of 'thelowrrolL l The 1ower end of this rod 19 is provided ,with nuts .placed on opposite sides of fixed frame lug, such as 2 0 (Ei g.` 2) `s o vthat the rod belongitdinally adjustedthus to hold the rear rolls infproper 'fixed relatan4 to ,the hammer beerd-v l Theupperv and` lower actuating arms 9 o'f the ,front rolls Vare 1 1r1.11etedY by @gel 'links-21' and 2 2, the middleortoggle joint of which is formed by aitoggle Apin 23. These link sl'are jointed `to the 'crossgpins .l2 and 13 respectively and their weight is Qntirelvcarried by the @rms 9? 'The tggl pin s 23, which connects the links isalso. supported by the-armlssagid this pin is connected by ajioating link 24 tothe uprightarm of a bellcrank 25 fulcrumed on an appropriate bracket orlug'on the mainframe. The lower horizontal armfofthis bell-crank is ljointed to the upper offset `end of operated niechanisrnfasmay be j employed Afor producing the board-gripping movement ofthe liftingv rolls. Where" the ordinary friction bar serves Vthis purpose, the weight of the latter jtends to rock the bellcrank and thereby'pull the link l `on opposite sides of the link 24, thisV arrangement 24 and the toggle pivot .23 outwardly, thus ex-V panding the toggle so as to spread the arms apart and this presses both rolls 5 and 6 'into gripping relation to the hammer board 3a. Inasmuch'as the roll-actuating arms 9 and the toggle links are respectively of equal radii and make equal angles with eachother and with the link 24, it will be apparent that thepressure is transmitted with substantial equality to each roll set. As shown in Fig. 3 and for the sake of symmetry, the toggle links 21 and 22v are each formedin pairs disposed being desirable but not essential.

The lower end of the friction bar 26 is guided as usual in a box 26a containing a catch to hold it.. elevated. This structure is not shown vin the draw-2'v ings because it is very common in theart. It will be understood that the catch operated by the cam surface 27 on the hammer proper when the latter falls, and thus releases the friction bar, al-

Y lowing it to drop.' The drop of the friction'bar moves therolls against-'the board by the means above just described and the rotation of the rolls lifts the hammer. VToward` the end of the hammers upstroke, its" studV 28 engages the friction bar lever 429 again lifting the latter. to its catch-A supported position, simultaneously releasing the roll pressure so thatthe hammer againfalls and so onthus producingl sustained reciprocation.- In order to prevent such operation, the board clamp treadle'30 is released, thereby Ybringing the board clamp mechanism, represented generally by r31 (Fig. 2)j intoaction to hold the board inV an elevated position, all as customary in this art. I

vat an angle thereto. The friction bar 4is connected to this extended arm Vso that its weightisrtransmitted substantially equally to both: of the'roll actuating'arm's andi hence to their rolls 5fand 6, f

In Fig. 6 the same principlewill beseen tob'e employed,but in this casethe upper togglelink is provided withhthe extension 88 to 'which the friction bar Ais Vconnected'so thatV the-weight of the bar tends to collapse the toggle .insteadVv of: ei;-

panding it. Y In Fig.-'1 Vthe weight of the friction bar is transmittedto lthejlinks so as to e'iipand Ythe toggle.`v In'this casefthe bar is jointed to one arm of aV bell vcrank 39, and the other engagesa-slotin the end of the rarm 40, which, like the arm'3'7of Fig'. 5, is an angular extension of one ofthe toggle links. I The direction of the force vexerted inl this manner on `the arm'40 is substantially'parallel f to the radiusY of the lower arm 9 and hence such force iswithout tendency to rock thatarm 'except as it rocks the toggle links and thereby moves both arms inunison and with equal pressure.

Figs. 5', 6 and 'I represent practical forms ofthe presentv invention, but noattempt has beenfmade toi-'illustrate all of the possiblexembodiments of the' toggle 'principles ernr'al'nredl and such as-may obviously be incorporated in various forms to produce `substantial equality of roll lgripping pressure as between Lthe different sets of rolls.

(Iclaim: o l

1. In a multiple roll-setboard drophammer, the combination of a hammer board, two pairs -`means connecting the same to. said arms adapt- .,of upper and lower lifting rollseccentric sleeves of board-lifting rolls therefor, a movable support for one roll of each pair, an actuating arm for each roll support, means whereby the movement of said arms in opposite directions moves said rolls in the same direction, and hammer controlled mechanism for simultaneously oppositely movingsai'dfarms. u

2.` In a multiple roll-set board drop hammer, the combination of a hammer board, two pairs of board-lifting rolls therefor, a movable'support for one roll .of each pair, an actuating arm for each roll support, means whereby the movement of said arms in opposite directions moves said rolls 4in the samev direction, a friction bar and ed for transmitting the lweight of said bar suby.stantially equally to said arms and in opposite and adaptedfoi coincidently moving said arms in'opposite directions, and hammer-controlled mechanism connected to 'actuate'fsaid connectingrtmeanrs.-

4..In' a.v drop" hammer, the combination'of a reciprocating hammer board, two vertically disposed` pairs ofA power-driven lifting rolls, arms appurtenantto one upper and one lower roll respectively and adapted'. formovement in oppositedirections for simultaneously moving both rolls*A toward said'board, connecting means between saidarms supported bythem', a floating lmkfor imparting movement to'said connecting means andv hammer-controlled mechanism for moving,sa;i;idlink, v y 1 5. In a. board drop hammer, the combination ofV upperV and lower lifting rolls, an'f eccentric sleeve supporting oneupper and one lower roll, the vecceiitricitiesV being of opposite directionsand hammer controlled means for simultaneously and oppositelyv rocking said supports.V

'6. Inva board drop hammer, the combination supporting the roll shaftsV of' each such roll; the 25 eccentricities of theupperand lower sleevesjbeling opposite in direction, substantially horizontal armsonsaid sleeves and means controlled by the reciprocation ofl the'hammeradapted for simultaneously spreading and collapsing 'saidjarms -'7."`In`.a drop hammer,A the combination :of a hammer board, Yupper and lowerA pairs of power drivenlifting rolls active on oppositefsidesV of said board, actuating' arms for moving such `rolls 135 toward and from-the board, a pairv lof links connected together and connecting said arms and means active in synchronism Awith the hammer for operating` said links "toggle fashion, in one ,direction putting both links simultane'ously'funder tension to draw said actuating arms together andv means toY thereby-,move the rollersin the same direction with respect. toV board ,gripping action, and in the opposite'direction putting-them simultaneously under 'compression to spread said 145 arms apart. and move the rollsina direction op- 'positelto thatA produced bymoving the yarms togethexnm o 1;1:

' 8,'In `a board drop hammer, the combination Yof Aa vhammer board, upper and lower lifting rolls v upon the direction of movement, a friction bar reciprocatedby the hammer,v means connecting lov said bar to sadrlinks and means operating to` put'both of said links coincidently under com pression and to produce one and the same direction of roll movement withY respect to board gripping action and under tension for the other of roll movement.

and opposite direction MICHAEL H. FLYNN. 

